File:Broken Image in Firefox and Chrome.png

Left: Firefox uses a broken document for its broken image icon. It is a blank document with a fold on the top-right corner and ripped horizontally.

Right: Chrome's broken image icon. It is a picture depicting a green hill on a normal day with a cloud on its top-left corner and a neutral sky blue background. There is a fold on the top-right corner and a clean cut from the center of the bottommost part to the center of the rightmost part.

License

Left: Mozilla Foundation and Firefox Contributors (Any version of Mozilla Public License)

Right: Google Inc. and The Chromium Authors (3-clause BSD License)

Please note that both licenses explicily allowed copying and derivation as long as the proper credits are given. Addtionally, the MPL license (but not BSD license) requires you to distribute the file in the same license or one of its compatible license (BSD is not listed on its license), but does allow to identify who is the creator if there are different from the contributor. BSD licenses (there are many) allows a different license (even in very long legalese proprietary EULAs) as long as the user does credit its creator. Overall, if this file is considered as one, it is under the MPL.